Hydraulic pump and pressure controlling device.



- L W. NELSON.

HYDRAULIC PUMP AND PRESSURE CONTROLLING DEVICE.

APPLICATION FILED 001. 29, 1907.

QMJLQZQD' Patented; Mar. 2, 5909.

2 SHEETS-S NVE/VT a 7 LI ATTORNEY J. w. NELSON. HYDRAULIC PUMP AND PRESSURE CONTROLLING DEVICE.

APPLICATION FILED 0GT.29,1907.

Patented Evian 2, M69.

2 SHEETS-SHEET 2.

INVENTOR ATTORNEY entra n srarnsrarnnr orirrcn JAMES W. NELsoN, or New YORK, N. Y.

nrnnannrc rmur AND rnr ssnnn CONTROLLING nnvron,

To all whom it may concern:

Be it known that 1, JAMES W. NELsoN, a. citizen of the United States, and a resident of'the city of New York, borough of Brooklyn, county of Kinga and State ofNew York, have invented certain new and useful Improvements in Hydraulic Pump and Pressure Controlliin Devices, of which the following is a speci cations This invention relates to devices for generating and japplying hydraulic pressure, with particular reference-to devices of this class for use in locations and under conditions which make necessary frequent removal and readjustment of the jack proper in order that the pressure generated may readily; be successively applied at different points.

-lhe more common and better known types of hydraulic jacks are what may be termed entirely self contained, that is, hav ing; the pump or pumps within the ram. It is obvious that where the work is of a nature to require several successive applications of ocality,

parts, one pumps and eing misunderstanding of signals.

who is in position ressure at different points in the same it is desirable that the jack be divided into two distinct but connected art containing the pump or stationary, and the other part containing the ram cylinder and ram arr-ii being readily removable from one point to another Within the radius of the flexible connection. Heretofore, so far as I am aware, the necessary valves and other means for controlling the flow and pressure form a art of what may be termed the pump memher, the operator of the pump being the one L who regulatesthe time of application of the ressure, its cessation. when desired, and the lien reliefthis usually upon signal from at some distance from the pump member. It will be ap arent that under some not unusual con 'tions both operators would work under a disadvantage, particularly where the work was being done amid .noisy surroundings likely to cause It is obvious that the man who is located at the ram, where the pressure is being applied, and to note the progress and effect of the work, should be able to quickly and positively control the application, extent'and durationbf the pressure, and the principal object of this invention is the prowhich is located Specification of. Letters Patent.

theoperator in charge of the ram member Patented 2, 1969.. Application filed October 29, 1907. Seria1No.399,70.

,- vision of a separated device of thigs ch aracterlj" in which the pressure-controlling iiieans are"; located at the rain, or, at least, withineasy access of the operator atjtlie'ram'; ltj'will be apparent that under such conditionsthe' operator who is watchingthe sprogress'and e; ect of the application of thepressure may temporarilycheck increase of the pressure, renew the same, or entirely relieve the same for removal and replacement of the ram member. l

. My invention will be more readily understood by reference to the accorn anying drawings, forming-a part of this "spe'ci'. cation, v,

Figure 1 is a side elevation of bothimem- 1 'bers of a completedevice'embodying my W invention; Fig. 2 is a transverse central section of the jack or ram member, and Fig. 3 is a transversecentral section of the pump member.

Referring now to the drawings in detail, numeral 11 refers to a suitablebase plate carrying, preferably integral therewith,.the y-' lindrical pump-block 12. i 12 is provided with a bore 13 within which snugly fits the piston-rod 14: which reciprocates therein to intermittently subject to pressure the liquid in the pump chamber 15, in whichsaid bore 13 terminates. The upper end This pump block i of the c linder 12 is provided with'a screw v threads pocket to receive'the' packing ring 16 which is firmly pressed therein and a ainst- 'the rod 14 by means of the'correspondingl threaded cap 17. The upper endof the'cy 4 inder 12 is exteriorly threaded to receive the interiorly threaded ring 18 carrying the yoke 19 which provides a guide for the upper end of the rod 14. The pump-block" 1 1' is further Q provided with a bracket 20150 or in -which is pivoted the link 21 which' provides an adjustable fulcrum for the pump lever22. rod 14 is. p'rovidedwith a flattenedbearin'g ortion 23 which is pivoted within the pump ever'22, so that by meansof said leverthe. rod 14 maybe vertically reciprocatedl The What I term theram membercompri'ses the ram cylinder 24 with the suitably closed bottom 25, and therewithin the vertically-acti v I ram 26 which is provided with the usua packing 27. Preferably secured to the eXte rior of the ram cylinder, irnany nor, is the valve box or cyliiider28 which I" have shown provided with a substantially central valve bore 29. This'valve bore '29 suitable manduct 44 in the I nearly but not quite to (when both are seated) the valve 31. The valve 35 is preferably spring-seated, as shown. The lower end of the bore 29 is seated by means of a plug or cap 51, and from that portion of the bore below the .valve 35 a duct 37 leads into the ram chamber 38. Into the chamber 33 at the upper end of said bore, preferably through the medium of a connection 39, leads the passage within a pipe or other suitable conduit 40 from any suitable source of liquid supply, such as a tank or barrel of water. Similarly opening into said bore 29, between the valves 31 and 35, is the passage provided by the pipe 41, said pipe being preferably of copper, lead or other soft metal whereby it may have the requisite strength to witl'istand the heavy pressure strains and yet be su'lliciently flexible to permit of very decided changes in the relative positions of pump and ram. This pipe 41 is preferably suitably secured to said valve cylinder by means of the common and well-known form of connection 42, and the other end thereof is provided with the connection 43 leading through the pump-block into the pump chamber 15.- v

It will now be apparent that when the pis ton 14is raised, a partial vacuum will be formed within the chamber 15 which will resuit in the liquid flowing from the source of supply through the pine 40, ast the valve 31 in the valve bore 29, throng the pipe 41 and into the chamber 15. Upon the downstroke of said piston, the liquid will be forced from said chamber 15 back through the pipe 41, the pressure in this casejseating the valve 31 and necessitating the :flow ofliquid past the valve 35 and through. the duct 37 into the ram chamber 38, where the pressure operatesto raise the ram 26 under the wellknown principles of, hydrostatics.

Opposite-the chamber 33 the wall of. the valve boX or cylinder 28 is provided with a screw-threaded aperture for the correspond ingly threaded lug 45, within which, is

'journaled the stu or short shaft 46 carrying,

at its inner end, within the chamber 33, the cam 47. The exterior end of said shaft is slotted to rovide a seat for the end of the o eratin ever 48, by means of which the s aft an camj are rotated. The cam 47 is so located and. adjusted that under normal conditions the operating face thereof is clear against the end of the stem 33 of the of the end of the st en: 32 of the valve 31, and 1t'1s, therefore, n n-niterl'erent with auto-- matic action of said valve. By rotating shait, the cam 47 may be made to nup a :lvc 31, first operating to positively unseat said valve, and, upon continuing depression, ol said valve, the latter will impinge against the end of the stem 36 and unse t the valvc 35 and hold both valves off their seats.

It will now be apparent that the workman or operator atthe ram may absolutely control the effective operation of the pump without signaling or otherwise conmuuiieating with the operator or workman at the pump and irrespective of a continuation of the pumping operation beyond the desired point. When it is desired to check an in crease of pressure, without relieving the existing pressure within the ram chamber, the Workman at the ram will throw the lever 48 to a vertical position, which causes the cam 47 to rotate just far enough to unseat the first valve only, under which conditions continuation of the pumping operation merely causes the liquid to flow back and forth through the now opened passage between the pump chamber and thesourccol' liquid supply. If additional pressure required, the workman at the ram will turn the'lever back to its original position (as inits automatic action of the valve 31 and,

consequently, effective operation of thepump. When the work has been done, and it is desired to remove the ram member, permanently or for readjustment in a new position, the workman at the ram will throw the lever 43 to a horizontal position oppositely directed to that indicated in Fig. 1, which will elfect, from the cam 47 maximum depression of the valve 31 and the consequent unseating of both valves in the bore 29, which provides an open passage from the ram chamber 38 to the source of supply. The weight of the ram itsell', under any ordinary conditions, will force the liquid out of said ram chamber and back into said source of supply, and this irrespective of-the fact that the workman at the pun'ip may have continued the pumping operation.

The ends of a curved plate 49, secured to or integral with said valve boX or cylinder 28,

may provide suitable stops to prevent acci-. dental rotation of the shaft 46, the lever 48 being normally in engagement with one or the other of said ends and being preferably pivoted in the end of the shaft 46 whereby, in order to rotate said shaft, it is necessary to first withdraw said lever clear of said plate 49, and subsequently operate the same to rotate said shaft. p

I have shown the plate 11 of sufficient length toprovide' a support for the )latform 50, against which the end of a suita le brace separate from the pump or pump member with a flexible or other conduit therebetween,

and the controlling valves are-located in the i I usual manner n the pump member, sa d connecting conduit is under contmuous and in-,.

termittently increasing pressure from the time the, pumping o eration is started until the work is done ant the pressure in the ram chamber relieved. Not only does this vastly increase the possibility of leakage and of more serious consequences in case of accident, but it is well known that copper pipe or tubingand such tubing is most frequently employed for this connection acquires a certain temper from being thus subjectedto pressure which within a comparatively short period of time destroys its flexibility and,

therefore, its usefulness for this purpose.-

W'ith' the valves located at what may be trolling device will doubt termed the ram end I plyin ot the connection, it will be apparent that the coiinecting'conduit is subjected to the pressure of the li uid only when the pump is in action, not on y doing away with a large proportion of the annoyance from accidents and leakage, but reducing by about ninety per cent. (so far as I can determine) the time during which the pipe or conduit is subjected to pressure, thus prolonging its useful life by preventing early hardening and rigidity and the necessity for frequent annealing.

Many' modifications of minor details of my improved hydraulic pum and pressure coness readily suggest themselves to those skilled in the art to which it appertains, and I therefore do not desire to limit my invention to the specific" construction herein shown and described. I

I claim as new and desire to secure by Letters Patent: 1. In combination, means'for generating hydraulic pressure, means apart therefrom and having flexible connection'therewith for applying the pressure and for controlling operations of both said generating and said applying means. i

2. In combination, means for generating hydraulic pressure, means apart therefrom and having flexible connection therewith for applying the pressurefand means contiguous to said aptplymg means for controlling o erations of 0th said generating. and sai apmeans.

hydraulic pressure, means apart therefrom and having flexible connection therewithpfor resist tender. cy

ttention is directed to the fact generating hydraulic selective points, and means ,of operation of said by saidpu'mp. combination, means for generating applying the pressure, and means forming part of said applying means for controlling:

the eii'ect of operation oi said generating.

means and for finally relieving the applied-, '1 pressure.

4. In combination, means for generating hydraulic pressure, and means .apart th.

from but'connnected therewith iora iplyin' said applying meansbeing the pressure, p controlling the flow ti vided with means for and "from said generating and said applyin;

means 5. In combination, stationary means for? pressure, relatively movable means'ior applying the pressure said ap lying means to and rom said generating means.

6. In combination,

generating hydraulic pressure, relatively movable means for applying the pressureat and means forming a part of,

selective points, said applying means for controlling the eiIGCt for finally relieving the applied pressure. 7

7. In combination, generating hydraulic pressure, means movable with respect thereto for applying the pressure, and means movable with said applying means for controlling the flow to and from both said generating and said applying means.

8. In combination, a stationary pump, a relatively movable ram and means forming a part of said ram to control the flow to and from said pump.

9. In combination, a stationary pump, a relatively movable ram and means forming a part of said ram to control the e'fiect of oper ation of said pump and for finally relieving the applied pressure.

10. In combination, a stationary pump, a movable ram, and means movable with said ram to control flow to-and from both said pump and'said; ram. f v

11. Incombinationgz a pum a separate ram cylinder and ram, fi'exrb e connecting controlling flow to and from both the pump chamber and the ram chamber.

forming part of ,i for controlling the flow" stationary means ror generating means and.

stationary means for -means secured to said ram cylinder for con- 13. In combination, a stationary member I containing the pump and a relatively movable member containing the pump valves and means for applying the pressure generated able mem er to apply the pressure generated a 1 16'. In combination,

by 'said pump, said movable member containing the pump valves and means for their manual control; v

15. In combination, avstationary member containin the pump and arelatively movable memlber to apply the pressure generated by said ump, said movable member containing t e pump valves and being. provided with. means or unseating one or more of said valves."

relatively movable ram-cylinder and ram, a

member 'securedto said ram-cylinder which contains a portion of the fluid-passage from contains a portion source of supply source of supply to: the pump chamber and t0 the ram chamber, suitable valves in said passage and in said members, and means for controlling said valves.

17". In combination, a stationary pump, a relatively movable ram-cylinder and ram,'a member secured to saidram-cylinder which of the fluid-passage from to the pump chamber, valves-in said passageand in said member, a duct leading from said assage below said valves'to the ram chamber, and means for controlling said valves.

18. In combination, a stationary pump, a

a stationary pump, a

'unseating one or all of said valves.

relatively movable ram-cylinder and ram, a member secured to said ram cylinder which contains a portion of the fluid-passage from source of supply to the pum chamber, suit able pump and pressure val sage and in'said member, said passage below said chamber, and means for positively un'se'ating' one of said valves, said operable to unseat all of 19. In combinatioma relatively movable ram-cylinder and ram, a member movable with said ram-cylinder which contains a portion of the fluid-passage from source of supply to the pump chamber, suitable valves in said passage in said member, a duct leading from said valves to the ram chamber, said member being provided with means for a duct leading from said valves.

In testimony of theforegoing, I have hereunto set my hand inthe presence of two subscribing witnesses.

JAMES w. NELSON.

Witnesses:

HELEN CRooKER, JAS. Moonn.

valves to the ram means being further stationary pump, a

said passage below' positively ves in said pas- 

